Cashmere yarn with lasting antibacterial function

Abstract

The invention relates to the technical field of blended yarns, in particular to cashmere yarn with a lasting antibacterial function, the cashmere yarn is composed of graft modified cashmere fibers, antibacterial modified linen fibers and a high polymer antibacterial finishing solution, the graft modified cashmere fibers are grafted through collagen, and the antibacterial modified linen fibers are grafted through linen fibers. The strength and coloring percentage of cashmere fibers can be improved, and subsequent coloring treatment is facilitated; the antibacterial modified linen fiber is subjected to antibacterial finishing by utilizing modified chitosan, so that the antibacterial property of the linen fiber can be improved; blended yarns are soaked in a high polymer antibacterial finishing solution, antibacterial effects can be achieved from different angles, the antibacterial performance of the yarns is remarkably improved, durability of the antibacterial effect is achieved, cashmere yarns are soaked in the high polymer antibacterial finishing solution to be soaked, left to stand, washed and dried, and the antibacterial effect of the cashmere yarns is improved. The antibacterial components can be uniformly attached to the surface and the interior of the yarn, so that the antibacterial durability and the overall quality of the yarn are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of blended yarns, and particularly relates to a cashmere yarn with a durable antibacterial function. Background Art

[0002] In the field of textiles, cashmere yarns have always been deeply loved by consumers for their excellent properties such as softness, warmth retention, and lightness, and are widely used in many fields such as high-end clothing and household items. However, traditional cashmere yarns themselves do not have antibacterial functions. During daily use, they are prone to becoming a breeding ground for bacteria and microorganisms. Especially in a humid and warm environment, bacteria will multiply in large numbers on the surface of cashmere yarns, which will not only produce odors, affect the wearing comfort, but also may spread diseases, posing a potential threat to the health of consumers.

[0003] With the improvement of people's living standards and the enhancement of health awareness, consumers' requirements for the functionality of textiles are also getting higher and higher, and antibacterial function has become one of the important indicators for measuring the quality of textiles. Therefore, developing a cashmere yarn with a durable antibacterial function to meet the market's demand for healthy and comfortable textiles has become an important problem that needs to be solved urgently in the current textile industry. Summary of the Invention

[0004] Technical Problem to be Solved

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a cashmere yarn with a durable antibacterial function, which can effectively solve the problem that the antibacterial performance of the cashmere yarn in the prior art cannot meet the market demand.

[0006] Technical Solution

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] A cashmere yarn with a durable antibacterial function, the composition of the cashmere yarn with a durable antibacterial function includes: graft-modified cashmere fibers, antibacterial-modified linen fibers, and a high-polymer antibacterial finishing solution;

[0009] The graft-modified cashmere fibers are obtained by grafting cashmere fibers with a cross-linking agent and collagen;

[0010] The antibacterial-modified linen fibers are obtained by subjecting linen fibers to antibacterial finishing with modified chitosan;

[0011] The high-polymer antibacterial finishing solution is prepared from methylacryloyloxyethyl trimethyl ammonium chloride and methyl acrylate as the main raw materials.

[0012] Furthermore, the preparation steps of the graft-modified cashmere fibers are as follows:

[0013] Step 1: Immerse the cashmere fibers in an acetone solution at 25°C and ultrasonically wash them, then immerse them in pure water at 30°C for ultrasonic oscillation. Repeat this process 3 times and then perform a drying treatment. The resulting product is denoted as pre-treated cashmere fibers.

[0014] Step 2: Immerse 2 - 3 g of the pre-treated cashmere fibers in 70 - 90 mL of a collagen solution. Under stirring conditions, add 0.5 - 0.8 g of a glutaraldehyde cross-linking agent, and then react for 24 h under a water bath condition at 40 - 60°C. The resulting product is denoted as the reaction component.

[0015] Step 3: Drain the water from the reaction component and then bake it at a temperature of 55°C for 8 - 10 min. Then bake it at a temperature of 68°C for 2 - 3 min and then place it in a soap solution at 60°C for cleaning for 10 min. Finally, rinse it with pure water 2 - 3 times and air-dry it at room temperature. The resulting product is the graft-modified cashmere fibers.

[0016] Furthermore, in Step 1, the method of ultrasonic washing is to ultrasonically wash for 5 - 10 min at a power of 100 - 200 W. The method of ultrasonic oscillation in Step 1 is to ultrasonically oscillate for 5 - 8 min at a power of 50 - 100 W. The method of drying treatment in Step 1 is to dry at a temperature of 25 - 28°C for 3 - 4 h. The concentration and pH value of the collagen solution in Step 2 are 10 - 15 g / L and 8 respectively.

[0017] Furthermore, the preparation steps of the antibacterial modified flax fibers are as follows:

[0018] Step A: Weigh 1 g of chitosan and dissolve it in 120 mL of an acetic acid solution. After stirring until dissolved, add 1 g of 1-hydroxybenzotriazole monohydrate. After reacting for 30 min, add 2 g of (3-carboxypropyl) triphenylphosphonium bromide and react for 10 h under a nitrogen atmosphere at 80°C. The resulting product is denoted as the reaction system.

[0019] Step B: Weigh 1 g of cyanuric chloride and dissolve it in 100 mL of an acetic acid solution. Stir it evenly and then pour it into the reaction system and react at an ice-water bath temperature of 0°C for 2 h. After dialysis treatment, perform freeze-drying, and then disperse it in pure water to prepare a solution with a mass fraction of 30%. The resulting product is the antibacterial finishing agent.

[0020] Step C: Immerse the flax fibers in a sodium carbonate solution at 40°C according to a bath ratio of 1:20. After soaking for 30 min, wash it with pure water 3 times and then immerse it in the antibacterial finishing agent at 40°C according to a bath ratio of 1:30. After soaking for 15 min, raise the temperature to 80°C and add sodium chloride with a weight of 5% of the flax fibers. Continue to soak for 15 min and then add sodium chloride with a weight of 10% of the flax fibers. Soak for another 1 h and then place it in a soap solution for cleaning for 10 min. After washing with pure water 3 times, perform a drying treatment. The resulting product is the antibacterial modified flax fibers.

[0021] Further, the mass fraction of the acetic acid solution in both Step A and Step B is 1%. The method of stirring until dissolution in Step A is to stir at a rotation speed of 400 - 500 r / min for 10 min. The method of stirring evenly in Step B is to stir at a rotation speed of 300 - 400 r / min for 10 min. The molecular weight cut-off value for dialysis treatment in Step B is 3500.

[0022] Further, the concentration of the sodium carbonate solution in Step C is 1 g / L. The drying treatment in Step C is to dry at a temperature of 28 - 30 °C for 5 - 8 h.

[0023] Further, the preparation steps of the high-polymer antibacterial finishing solution are as follows:

[0024] Step I: Measure 10 mL of methacryloyloxyethyl trimethyl ammonium chloride and 0.1 mL of methyl acrylate and pour them into 90 mL of pure water. After stirring and reacting for 30 min under nitrogen protection, add 0.4 g of potassium persulfate, and react for 8 h under an oil bath condition at 70 °C. The resulting product is denoted as the reaction product.

[0025] Step II: Rotate and evaporate the reaction product to reduce its volume to half of the original, then purify it with acetone. Next, dissolve it in pure water and wash it 3 times, and then perform a drying treatment. The resulting product is denoted as the high-polymer antibacterial agent.

[0026] Step III: Dissolve the high-polymer antibacterial agent in pure water according to a weight ratio of 1:10. After stirring until dissolution, adjust the pH value to 1 with a hydrochloric acid solution with a concentration of 1 mol / L. The resulting product is the high-polymer antibacterial finishing solution.

[0027] Further, the rotation speed of stirring and reacting in Step I is 100 - 200 r / min. The method of drying treatment in Step II is to dry at a temperature of 45 - 50 °C for 5 - 8 h. The method of stirring until dissolution in Step III is to stir at a rotation speed of 500 - 600 r / min for 5 min.

[0028] Further, the preparation method of the cashmere yarn with a persistent antibacterial function is as follows:

[0029] S1: Blend and prepare the cashmere yarn according to a blending ratio of 50 - 60% of graft-modified cashmere fibers and 40 - 50% of antibacterial-modified flax fibers.

[0030] S2: Immerse the cashmere yarn in the high-polymer antibacterial finishing solution according to a bath ratio of 1:20 and soak for 2 - 3 min. Then place it in an oven at 28 °C and let it stand for 30 min. Wash it 3 times with pure water and then perform a drying treatment. The resulting product is the cashmere yarn with a persistent antibacterial function.

[0031] Further, the method of drying treatment in S2 is to dry at a temperature of 25 - 30 °C for 5 - 10 h.

[0032] Beneficial effects

[0033] The present invention provides a cashmere yarn with a persistent antibacterial function. Compared with the existing well-known technologies, the present invention has the following beneficial effects:

[0034] 1. The cashmere yarn in the present invention is composed of graft-modified cashmere fibers, antibacterial-modified flax fibers, and a high-polymer antibacterial finishing solution. The graft-modified cashmere fibers are grafted through collagen, which can improve the strength and coloring percentage of the cashmere fibers, facilitating subsequent coloring treatment; the antibacterial-modified flax fibers are subjected to antibacterial finishing using modified chitosan, which can improve the antibacterial performance of the flax fibers; soaking the blended yarn in the high-polymer antibacterial finishing solution can exert antibacterial effects from different angles, thus significantly improving the antibacterial performance of the yarn and achieving the persistence of the antibacterial effect.

[0035] 2. During the preparation process of the graft-modified cashmere fibers in the present invention, through multiple processes such as ultrasonic washing with acetone solution, ultrasonic oscillation with pure water, grafting with a crosslinking agent, baking, washing with soap solution, and rinsing with pure water, while effectively removing the impurities on the surface of the cashmere fibers, it can also improve the surface properties and structure of the fibers through grafting reactions, making them have better softness, gloss, and coloring percentage; in the preparation of the antibacterial-modified flax fibers, chitosan forms an antibacterial finishing agent through a series of reactions, and then the flax fibers are subjected to antibacterial finishing. While enhancing the antibacterial performance of the flax fibers, it also optimizes their fiber structure, which can improve the strength and durability of the fibers; secondly, soaking, standing, washing, and drying the cashmere yarn in the high-polymer antibacterial finishing solution can make the antibacterial components evenly adhere to the surface and inside of the yarn, thereby further improving the antibacterial persistence and overall quality of the yarn. Specific embodiments

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0037] The present invention will be further described below in conjunction with the embodiments.

[0038] The sources of some components in the examples and comparative examples are as follows:

[0039] Cashmere fibers, fineness 20μm, length 50mm, Inner Mongolia Beiping Textile Co., Ltd.;

[0040] Collagen, molecular weight 3000, Shanghai Purezhon Biotechnology Co., Ltd.;

[0041] Glutaraldehyde crosslinking agent, Chengdu Aike Chemical Reagent Co., Ltd.;

[0042] Chitosan, degree of deacetylation ≥ 95%, viscosity 100 - 200 mPa·s, Nantong Green God Biotechnology Co., Ltd.;

[0043] Acetic acid, Jinan Qichen Chemical Co., Ltd.;

[0044] 1-Hydroxybenzotriazole monohydrate, Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0045] (3-Carboxypropyl)triphenylphosphonium bromide, Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0046] Cyanuric chloride, Shanghai Macklin Biochemical Co., Ltd.;

[0047] Sodium carbonate, Tianjin Guangfu Technology Development Co., Ltd.;

[0048] Sodium chloride, Liaoning Quanrui Reagent Co., Ltd.;

[0049] Flax fiber, Qiqihar Jinya Flax Textile Co., Ltd.;

[0050] Methacryloyloxyethyltrimethylammonium chloride, Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0051] Methyl acrylate, Tianjin Kemiou Chemical Reagent Co., Ltd.;

[0052] Potassium persulfate, Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0053] Hydrochloric acid, Nanjing Shengqinghe Chemical Industry Co., Ltd.;

[0054] Example 1

[0055] A cashmere yarn with a persistent antibacterial function in this example, the composition of the cashmere yarn with a persistent antibacterial function includes: graft-modified cashmere fiber, antibacterial-modified flax fiber, and a high-polymer antibacterial finishing solution;

[0056] The graft-modified cashmere fiber is prepared by grafting collagen to cashmere fiber with a crosslinking agent. The specific preparation steps are as follows:

[0057] Step 1: Immerse the cashmere fiber in an acetone solution at 25°C and ultrasonically wash it at a power of 100 W for 5 min, then immerse it in pure water at 30°C and ultrasonically oscillate it at a power of 50 W for 5 min. Repeat 3 times and then dry it at a temperature of 25°C for 3 h. The obtained product is denoted as pretreated cashmere fiber;

[0058] Step 2: Immerse 2 g of pretreated cashmere fibers into 70 mL of a collagen solution with a concentration of 10 g / L and a pH value of 8. Add 0.5 g of glutaraldehyde crosslinking agent under stirring conditions at a rotation speed of 200 r / min. Then, react for 24 h under a water bath condition at 40 °C. The obtained product is denoted as the reaction component;

[0059] Step 3: Drain the water from the reaction component and then bake it at a temperature of 55 °C for 8 min. Then, bake it at a temperature of 68 °C for 2 min and place it in a soap solution at 60 °C for cleaning for 10 min. Finally, rinse it twice with pure water and air-dry it at room temperature. The obtained product is the graft-modified cashmere fiber.

[0060] The antibacterial modified flax fiber is prepared by subjecting the modified chitosan to antibacterial finishing on the flax fiber. The specific preparation steps are as follows:

[0061] Step A: Weigh 1 g of chitosan and dissolve it in 120 mL of an acetic acid solution with a mass fraction of 1%. Stir it at a rotation speed of 400 r / min for 10 min, then add 1 g of 1-hydroxybenzotriazole monohydrate. After reacting for 30 min, add 2 g of (3-carboxypropyl) triphenylphosphonium bromide. React for 10 h under a nitrogen atmosphere at 80 °C. The obtained product is denoted as the reaction system;

[0062] Step B: Weigh 1 g of cyanuric chloride and dissolve it in 100 mL of an acetic acid solution with a mass fraction of 1%. Stir it at a rotation speed of 300 r / min for 10 min, then pour it into the reaction system and react at an ice-water bath temperature of 0 °C for 2 h. After dialysis treatment with a molecular weight cut-off value of 3500, perform freeze-drying. Then, disperse it in pure water to prepare a solution with a mass fraction of 30%. The obtained product is the antibacterial finishing agent;

[0063] Step C: Immerse the flax fiber into a sodium carbonate solution with a concentration of 1 g / L at 40 °C according to a bath ratio of 1:20. After soaking for 30 min, wash it 3 times with pure water and then immerse it into the antibacterial finishing agent at 40 °C according to a bath ratio of 1:30. After soaking for 15 min, raise the temperature to 80 °C and add sodium chloride with a weight of 5% of the flax fiber. Continue to soak for 15 min, then add sodium chloride with a weight of 10% of the flax fiber. Soak for another 1 h and then place it in a soap solution for cleaning for 10 min. After washing 3 times with pure water, dry it at a temperature of 28 °C for 5 h. The obtained product is the antibacterial modified flax fiber.

[0064] The high-polymer antibacterial finishing solution is prepared using methacryloyloxyethyl trimethyl ammonium chloride and methyl acrylate as the main raw materials. The specific preparation steps are as follows:

[0065] Step I: Measure 10 mL of methacryloyloxyethyl trimethyl ammonium chloride and 0.1 mL of methyl acrylate and pour them into 90 mL of pure water. Stir and react at a speed of 100 r / min under nitrogen protection for 30 min, then add 0.4 g of potassium persulfate. React under an oil bath condition at 70 °C for 8 h, and the obtained product is denoted as the reaction product;

[0066] Step II: Rotate and evaporate the reaction product to reduce its volume to half of the original, then purify it with acetone. Then, dissolve it in pure water and wash it 3 times, and then dry it at a temperature of 45 °C for 5 h. The obtained product is denoted as the polymer antibacterial agent;

[0067] Step III: Dissolve the polymer antibacterial agent in pure water according to a weight ratio of 1:10, stir at a speed of 500 r / min for 5 min until dissolved, and then adjust the pH value to 1 with a hydrochloric acid solution with a concentration of 1 mol / L. The obtained product is the polymer antibacterial finishing solution.

[0068] The preparation method of the cashmere yarn with a persistent antibacterial function is as follows:

[0069] S1: Blend and prepare the cashmere yarn according to a blending ratio of 50% graft-modified cashmere fiber and 50% antibacterial-modified flax fiber;

[0070] S2: Immerse the cashmere yarn in the polymer antibacterial finishing solution according to a bath ratio of 1:20 and soak for 2 min. Then, place it in an oven at 28 °C and let it stand for 30 min. Wash it 3 times with pure water and then dry it at a temperature of 25 °C for 5 h. The obtained product is the cashmere yarn with a persistent antibacterial function.

[0071] Example 2

[0072] A cashmere yarn with a persistent antibacterial function in this example, the composition of the cashmere yarn with a persistent antibacterial function includes: graft-modified cashmere fiber, antibacterial-modified flax fiber, and polymer antibacterial finishing solution;

[0073] The graft-modified cashmere fiber is obtained by grafting cashmere fiber with cross-linking agent and collagen. The specific preparation steps are as follows:

[0074] Step 1: Immerse the cashmere fiber in an acetone solution at 25 °C and ultrasonically wash it at a power of 200 W for 10 min. Then, immerse it in pure water at 30 °C and ultrasonically oscillate it at a power of 100 W for 8 min. Repeat 3 times and then dry it at a temperature of 28 °C for 4 h. The obtained product is denoted as the pretreated cashmere fiber;

[0075] Step 2: Immerse 3 g of pretreated cashmere fiber in 90 mL of collagen solution with a concentration and pH value of 15 g / L and 8 respectively. Add 0.8 g of glutaraldehyde cross-linking agent under the stirring condition at a speed of 300 r / min. Then, react under a water bath condition at 60 °C for 24 h. The obtained product is denoted as the reaction component;

[0076] Step 3: drain the reaction components and bake them at 55°C for 10 minutes, then bake them at 68°C for 3 minutes and wash them in 60°C soap solution for 10 minutes. Finally, rinse them with pure water three times and dry them at room temperature to obtain grafted modified cashmere fiber.

[0077] The antibacterial modified flax fiber is prepared by subjecting the modified chitosan to antibacterial finishing of the flax fiber, and the specific preparation steps are as follows:

[0078] Step A, weigh 1g of chitosan and dissolve it in 120mL of 1% acetic acid solution, stir at a speed of 500r / min for 10min, add 1g of 1-hydroxybenzotriazole monohydrate, react for 30min, add 2g of (3-carboxypropyl)triphenylphosphonium bromide, react for 10h under a nitrogen atmosphere at 80°C, and record the result as the reaction system;

[0079] Step B, weigh 1g of cyanuric chloride and dissolve it in 100mL of 1% acetic acid solution, stir it at a speed of 400r / min for 10min, pour it into the reaction system and react it at an ice water bath temperature of 0°C for 2h, dialyze it with a molecular weight cutoff value of 3500, and then disperse it in pure water to prepare a solution with a mass fraction of 30%, and the obtained solution is an antibacterial finishing agent;

[0080] Step C, immersing the flax fiber in a sodium carbonate solution with a concentration of 1g / L at 40°C according to a bath ratio of 1:20, washing it with pure water three times after immersion for 30 minutes, and immersing it in an antibacterial finishing agent at 40°C with a bath ratio of 1:30, and heating it to 80°C after immersion for 15 minutes and adding sodium chloride with a weight of 5% of the flax fiber, and adding sodium chloride with a weight of 10% of the flax fiber after continuing to immerse for 15 minutes, and then immersing it again for 1 hour and washing it in a soap solution for 10 minutes, and then washing it with pure water three times and drying it at a temperature of 30°C for 8 hours, and the obtained antibacterial modified flax fiber is obtained.

[0081] The polymer antibacterial finishing solution is prepared with methacryloyloxyethyl trimethyl ammonium chloride and methyl acrylate as main raw materials, and the specific preparation steps are as follows:

[0082] Step I: 10 mL of methacryloyloxyethyl trimethylammonium chloride and 0.1 mL of methyl acrylate were poured into 90 mL of pure water, stirred at 200 r / min for 30 min under nitrogen protection, and then 0.4 g of potassium persulfate was added. The mixture was reacted in an oil bath at 70° C. for 8 h, and the result was recorded as the reaction product;

[0083] Step II, reducing the reaction product to half of its original volume by rotary evaporation, purifying it with acetone, then dissolving and washing it with pure water for 3 times, and drying it at 50° C. for 8 h. The obtained product is recorded as a polymer antibacterial agent;

[0084] Step III: Dissolve the polymer antibacterial agent in pure water at a weight ratio of 1:10, stir at a speed of 600 r / min for 5 min until dissolved, and then adjust the pH value to 1 with a hydrochloric acid solution with a concentration of 1 mol / L. The resulting solution is the polymer antibacterial finishing solution.

[0085] The preparation method of cashmere yarn with a persistent antibacterial function is as follows:

[0086] S1: Blend cashmere yarn according to a blending ratio of 60% graft-modified cashmere fiber and 40% antibacterial-modified flax fiber.

[0087] S2: Immerse the cashmere yarn in the polymer antibacterial finishing solution at a bath ratio of 1:20 and soak for 3 min. Then place it in an oven at 28°C and let it stand for 30 min. Wash it 3 times with pure water and then dry it at 30°C for 10 h. The resulting product is the cashmere yarn with a persistent antibacterial function.

[0088] Example 3

[0089] A cashmere yarn with a persistent antibacterial function in this example, the composition of the cashmere yarn with a persistent antibacterial function includes: graft-modified cashmere fiber, antibacterial-modified flax fiber, and polymer antibacterial finishing solution;

[0090] The graft-modified cashmere fiber is obtained by grafting cashmere fiber with a cross-linking agent and collagen. The specific preparation steps are as follows:

[0091] Step 1: Immerse the cashmere fiber in an acetone solution at 25°C and ultrasonically wash it at a power of 150 W for 8 min. Then immerse it in pure water at 30°C and ultrasonically oscillate it at a power of 80 W for 7 min. Repeat this 3 times and then dry it at 27°C for 4 h. The resulting product is denoted as pretreated cashmere fiber;

[0092] Step 2: Immerse 3 g of pretreated cashmere fiber in 80 mL of a collagen solution with a concentration and pH value of 13 g / L and 8 respectively. Add 0.7 g of glutaraldehyde cross-linking agent under stirring conditions at a rotation speed of 300 r / min. Then react it under a water bath condition at 50°C for 24 h. The resulting product is denoted as the reaction component;

[0093] Step 3: Drain the water from the reaction component and then bake it at 55°C for 9 min. Then bake it at 68°C for 3 min and then wash it in a soap solution at 60°C for 10 min. Finally, rinse it 2 times with pure water and air-dry it at room temperature. The resulting product is the graft-modified cashmere fiber.

[0094] The antibacterial-modified flax fiber is obtained by performing antibacterial finishing on flax fiber with modified chitosan. The specific preparation steps are as follows:

[0095] Step A: Weigh 1 g of chitosan and dissolve it in 120 mL of acetic acid solution with a mass fraction of 1%. Stir at a speed of 500 r / min for 10 min, then add 1 g of 1-hydroxybenzotriazole monohydrate. After reacting for 30 min, add 2 g of (3-carboxypropyl) triphenylphosphonium bromide and react in a nitrogen atmosphere at 80 °C for 10 h. The resulting product is denoted as the reaction system.

[0096] Step B: Weigh 1 g of cyanuric chloride and dissolve it in 100 mL of acetic acid solution with a mass fraction of 1%. Stir at a speed of 400 r / min for 10 min, then pour it into the reaction system and react in an ice-water bath at 0 °C for 2 h. After dialysis treatment with a molecular weight cut-off value of 3500, it is freeze-dried. Then it is dispersed in pure water to prepare a solution with a mass fraction of 30%. The resulting product is the antibacterial finishing agent.

[0097] Step C: Immerse linen fibers in a sodium carbonate solution with a concentration of 1 g / L at 40 °C according to a bath ratio of 1:20. After soaking for 30 min, wash it 3 times with pure water and then immerse it in the antibacterial finishing agent at 40 °C according to a bath ratio of 1:30. After soaking for 15 min, raise the temperature to 80 °C and add sodium chloride with a weight of 5% of the linen fibers. Continue to soak for 15 min, then add sodium chloride with a weight of 10% of the linen fibers and soak for another 1 h. Then place it in soapy water and wash for 10 min. After washing 3 times with pure water, dry it at 29 °C for 7 h. The resulting product is the antibacterial modified linen fibers.

[0098] The high polymer antibacterial finishing solution is prepared with methacryloyloxyethyl trimethyl ammonium chloride and methyl acrylate as the main raw materials. The specific preparation steps are as follows:

[0099] Step I: Measure 10 mL of methacryloyloxyethyl trimethyl ammonium chloride and 0.1 mL of methyl acrylate and pour them into 90 mL of pure water. Stir and react at a speed of 200 r / min under nitrogen protection for 30 min, then add 0.4 g of potassium persulfate and react in an oil bath at 70 °C for 8 h. The resulting product is denoted as the reaction product.

[0100] Step II: Rotate and evaporate the reaction product to reduce it to half of the original volume, then purify it with acetone. Then dissolve and wash it 3 times with pure water and dry it at 48 °C for 7 h. The resulting product is denoted as the high polymer antibacterial agent.

[0101] Step III: Dissolve the high polymer antibacterial agent in pure water according to a weight ratio of 1:10. Stir at a speed of 600 r / min for 5 min until it is dissolved, then adjust the pH value to 1 with a hydrochloric acid solution with a concentration of 1 mol / L. The resulting product is the high polymer antibacterial finishing solution.

[0102] The preparation method of cashmere yarn with a persistent antibacterial function is as follows:

[0103] S1. Blend and produce cashmere yarn according to the blending ratio of 55% graft-modified cashmere fiber and 45% antibacterial-modified flax fiber;

[0104] S2. Immerse the cashmere yarn in the high-polymer antibacterial finishing solution according to the bath ratio of 1:20 and soak for 3 min, then place it in an oven at 28 °C and let it stand for 30 min. Wash it 3 times with pure water and then dry it at 28 °C for 8 h. The obtained product is the cashmere yarn with a durable antibacterial function.

[0105] Comparative Example 1

[0106] A kind of cashmere yarn with a durable antibacterial function provided in this comparative example is roughly the same as that in Example 1. The main difference is that in this Comparative Example 1, the graft-modified cashmere fiber in Example 1 is replaced with unmodified cashmere fiber.

[0107] Comparative Example 2

[0108] A kind of cashmere yarn with a durable antibacterial function provided in this comparative example is roughly the same as that in Example 1. The main difference is that in this Comparative Example 2, the antibacterial-modified flax fiber in Example 1 is replaced with unmodified flax fiber.

[0109] Comparative Example 3

[0110] A kind of cashmere yarn with a durable antibacterial function provided in this comparative example is roughly the same as that in Example 1. The main difference is that in this Comparative Example 3, the high-polymer antibacterial finishing solution in Example 1 is replaced with the antibacterial finishing agent in Example 1.

[0111] Performance Test

[0112] Mark the cashmere yarns with a durable antibacterial function prepared in Examples 1 - 3 and Comparative Examples 1 - 3 as Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, and Comparative Example 3 respectively. Then, detect the antibacterial properties of Examples 1 - 3 and Comparative Examples 1 - 3. The specific detection method is as follows: Refer to the relevant regulations of the first part Agar Plate Diffusion Method and the third part Oscillation Method in GB / T20944-2007 "Evaluation of Antibacterial Properties of Textiles" to prepare samples, and use the standard slant cultures of Escherichia coli, Staphylococcus aureus, Pseudomonas, and Aspergillus to conduct tests. The obtained antibacterial data are recorded in the following table;

[0113]

[0114] It can be seen from the data in the above table that the antibacterial rates of the cashmere yarns with persistent antibacterial function prepared in Examples 1-3 are significantly higher than those in Comparative Examples 1-3, indicating that adding graft-modified cashmere fibers, antibacterial-modified flax fibers and polymer antibacterial finishing solution in the preparation of cashmere yarns with persistent antibacterial function according to the present invention can significantly improve the antibacterial performance.

[0115] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0116] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the present invention in each embodiment.

Claims

1. A cashmere yarn with a persistent antibacterial function, characterized in that, The cashmere yarn with persistent antibacterial function consists of the following components: graft-modified cashmere fibers, antibacterial-modified flax fibers, and a high-polymer antibacterial finishing solution; The graft-modified cashmere fibers are obtained by grafting cashmere fibers with a cross-linking agent and collagen; The antibacterial-modified flax fibers are obtained by subjecting flax fibers to antibacterial finishing with modified chitosan; The high-polymer antibacterial finishing solution is prepared using methylacryloyloxyethyl trimethyl ammonium chloride and methyl acrylate as the main raw materials.

2. The cashmere yarn with a persistent antibacterial function according to claim 1, characterized in that, The preparation steps of the graft-modified cashmere fibers are as follows: Step 1: Immerse the cashmere fibers in an acetone solution at 25°C for ultrasonic washing, then immerse them in pure water at 30°C for ultrasonic oscillation. Repeat this process 3 times and then perform drying treatment. The resulting product is denoted as pre-treated cashmere fibers; Step 2: Immerse 2 - 3 g of the pre-treated cashmere fibers in 70 - 90 mL of a collagen solution. Under stirring conditions, add 0.5 - 0.8 g of glutaraldehyde cross-linking agent, and then react for 24 h under a water bath condition at 40 - 60°C. The resulting product is denoted as the reaction component; Step 3: Drain the water from the reaction component and bake it at a temperature of 55°C for 8 - 10 min, then bake it at a temperature of 68°C for 2 - 3 min and place it in a soap solution at 60°C for cleaning for 10 min. Finally, rinse it with pure water 2 - 3 times and air-dry it at room temperature. The resulting product is the graft-modified cashmere fibers.

3. The cashmere yarn with a persistent antibacterial function according to claim 2, characterized in that, In Step 1, the method of ultrasonic washing is to perform ultrasonic washing at a power of 100 - 200 W for 5 - 10 min, the method of ultrasonic oscillation in Step 1 is to perform ultrasonic oscillation at a power of 50 - 100 W for 5 - 8 min, the method of drying treatment in Step 1 is to dry it at a temperature of 25 - 28°C for 3 - 4 h, and the concentration and pH value of the collagen solution in Step 2 are 10 - 15 g / L and 8 respectively.

4. The cashmere yarn with a persistent antibacterial function according to claim 1, characterized in that, The preparation steps of the antibacterial-modified flax fibers are as follows: Step A: Weigh 1 g of chitosan and dissolve it in 120 mL of acetic acid solution. After stirring until dissolved, add 1 g of 1-hydroxybenzotriazole monohydrate. After reacting for 30 min, add 2 g of (3-carboxypropyl) triphenylphosphonium bromide and react for 10 h under a nitrogen atmosphere at 80°C. The resulting product is denoted as the reaction system; Step B: Weigh 1 g of cyanuric chloride and dissolve it in 100 mL of acetic acid solution. Stir it evenly and pour it into the reaction system and react at an ice-water bath temperature of 0°C for 2 h. After dialysis treatment, perform freeze-drying, and then disperse it in pure water to prepare a solution with a mass fraction of 30%. The resulting product is the antibacterial finishing agent; Step C: Immerse the flax fibers in a sodium carbonate solution at 40°C according to a bath ratio of 1:

20. After soaking for 30 min, wash it with pure water 3 times and immerse it in the antibacterial finishing agent at 40°C according to a bath ratio of 1:

30. After soaking for 15 min, raise the temperature to 80°C and add sodium chloride with a weight of 5% of the flax fibers, continue to soak for 15 min, then add sodium chloride with a weight of 10% of the flax fibers, soak for another 1 h, and then place it in a soap solution for cleaning for 10 min. After washing with pure water 3 times, perform drying treatment. The resulting product is the antibacterial-modified flax fibers.

5. The cashmere yarn with a persistent antibacterial function according to claim 4, characterized in that, In both step A and step B, the mass fraction of the acetic acid solution is 1%. In step A, the method of stirring until dissolved is to stir at a rotation speed of 400 - 500 r / min for 10 min. In step B, the method of stirring evenly is to stir at a rotation speed of 300 - 400 r / min for 10 min. In step B, the molecular weight cut-off value for dialysis treatment is 3500.

6. A cashmere yarn with a persistent antibacterial function according to claim 4, characterized in that, In step C, the concentration of the sodium carbonate solution is 1 g / L. In step C, the drying treatment is to dry at a temperature of 28 - 30 °C for 5 - 8 h.

7. The cashmere yarn with a persistent antibacterial function according to claim 1, characterized in that, The preparation steps of the high-polymer antibacterial finishing solution are as follows: Step I: Measure 10 mL of methacryloyloxyethyl trimethyl ammonium chloride and 0.1 mL of methyl acrylate and pour them into 90 mL of pure water. After stirring and reacting for 30 min under nitrogen protection, add 0.4 g of potassium persulfate, and react for 8 h under an oil bath condition of 70 °C. The obtained product is denoted as the reaction product. Step II: Rotate and evaporate the reaction product to reduce its volume to half of the original volume, then purify it with acetone. Next, dissolve it in pure water and wash it 3 times, and then perform a drying treatment. The obtained product is denoted as the high-polymer antibacterial agent. Step III: Dissolve the high-polymer antibacterial agent in pure water according to a weight ratio of 1:10, stir until dissolved, and then adjust the pH value to 1 with a hydrochloric acid solution with a concentration of 1 mol / L. The obtained product is the high-polymer antibacterial finishing solution.

8. The cashmere yarn with a persistent antibacterial function according to claim 7, characterized in that, In step I, the rotation speed of the stirring reaction is 100 - 200 r / min. In step II, the drying treatment method is to dry at a temperature of 45 - 50 °C for 5 - 8 h. In step III, the method of stirring until dissolved is to stir at a rotation speed of 500 - 600 r / min for 5 min.

9. The cashmere yarn with a persistent antibacterial function according to claim 1, characterized in that, The preparation method of the cashmere yarn with a persistent antibacterial function is as follows: S1: Blend and prepare a cashmere yarn according to a blending ratio of 50 - 60% of graft-modified cashmere fibers and 40 - 50% of antibacterial-modified flax fibers. S2: Immerse the cashmere yarn in the high-polymer antibacterial finishing solution according to a bath ratio of 1:20 and soak for 2 - 3 min. Then place it in an oven at 28 °C and let it stand for 30 min. Wash it 3 times with pure water and then perform a drying treatment. The obtained product is the cashmere yarn with a persistent antibacterial function.

10. A cashmere yarn with a persistent antibacterial function according to claim 9, characterized in that, In S2, the drying treatment method is to dry at a temperature of 25 - 30 °C for 5 - 10 h.

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